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United States Patent | 5,771,333 |
Hirayama ,   et al. | June 23, 1998 |
An input video signal is applied to a transmission line first through a time direction emphasizer for emphasizing the levels of time direction high frequency components of the video signal, relative to the levels of low frequency components thereof; secondary through a vertical direction emphasizer; and thirdly through a horizontal direction emphasizer. Further, the received video signal is outputted as an output video signal from the transmission line first through a horizontal direction deemphasizer for deemphasizing the levels of horizontal direction high frequency components of the video signal, relative to the levels of low frequency components thereof; secondary through a vertical direction deemphasizer; and thirdly through a time direction deemphasizer. The emphasis and deemphasis method enables the dynamic range of the transmission line to be utilized effectively, while preventing erroneous operation on the reception side.
Inventors: | Hirayama; Ryo (Kamakura, JP); Kobayashi; Kaoru (Yokohama, JP) |
Assignee: | Victor Company of Japan (Yokohama, JP) |
Appl. No.: | 705004 |
Filed: | August 29, 1996 |
Dec 24, 1992[JP] | 4-359260 |
Current U.S. Class: | 386/85; 386/93 |
Intern'l Class: | H04N 005/923 |
Field of Search: | 386/46,48,13,85-12,9,93 348/613 |
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5194998 | Mar., 1993 | Kawasaki | 386/85. |
5305112 | Apr., 1994 | Yamamoto et al. | 358/310. |
Foreign Patent Documents | |||
0486300 | May., 1992 | EP. | |
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